React Native Socket.io Broadcast Message

broadcast.js

// Server side
socket.on('message', (message) => {
  // Save the message document in the `messages` collection.
  db.collection('messages').insert(message);
  
  // The `broadcast` allows us to send to all users but the sender.
  socket.broadcast.emit('message', message);
});

// Client side
socket.on('message', (message) => {
  var oldMessages = this.state.messages;
  // React will automatically rerender the component when a new message is added.
  this.setState({ messages: oldMessages.concat(message) });
});